<table style="width: 600px; border: 1px solid #ddd; border-radius: 3px; color: #555; font-size: 12px; height: auto; margin: auto; overflow: hidden; text-align: left; word-break: break-all; word-wrap: break-word;" cellspacing="0" cellpadding="0" border="0">
    <tbody style="margin: 0; padding: 0;">
        <tr style="background-color: #393D49; height: 60px; margin: 0; padding: 0;">
            <td style="margin: 0; padding: 0;">
                <div style="color: #5EB576; margin: 0; margin-left: 30px; padding: 0;">
                    <a style="font-size: 14px; margin: 0; padding: 0; color: #5EB576; text-decoration: none;"
                        href="{{ url_root }}" target="_blank" rel="noopener">
                        {{ site_name }}
                    </a>
                </div>
            </td>
        </tr>
        <tr style="margin: 0; padding: 0;">
            <td style="margin: 0; padding: 30px;">
                {% block body %}{% endblock %}
            </td>
        </tr>
        <tr style="background-color: #fafafa; color: #999; height: 35px; margin: 0; padding: 0; text-align: center;">
            <td style="margin: 0; padding: 0;">如非本人，请勿操作！系统邮件，请勿回复！</td>
        </tr>
    </tbody>
</table>